The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.

WatchingU 9 · June 1, 2019

Serial Number 646000 was reported as inaccurate.

Note: 17 jewels, not marked Plymouth, sn 646000 perhaps
specially made. This appears to be the last one
produced. Only 2000 of this run were produced as
sn 646001 and higher are a 16s 7j movement as is
shown by user verification and how the company
records overlap from 646001 to 646600.

Curator Response: Thanks for the report. The estimated total production already takes the corrected run into account. There is another run of Model 1 Grade 162 with serial numbers 732,001-732,500, identified in a supplement issued by Rockford following the 1907 serial list.

Verizons4galaxy 1 · July 10, 2017

Serial Number 645896 was reported as accurate.